set_property IOSTANDARD LVCMOS33 [get_ports clk]
set_property IOSTANDARD LVCMOS33 [get_ports clk_out]
set_property IOSTANDARD LVCMOS33 [get_ports rst]
set_property PACKAGE_PIN F4 [get_ports rst]
set_property PACKAGE_PIN Y18 [get_ports clk]
set_property PACKAGE_PIN AA21 [get_ports clk_out]
